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Flat Head
Self-Tapping Screws     Self-Tapping Screws
Flat Heads for Self-Tapping Screws
Nominal Size These Lengths or Shorter are Undercut A H J T M G N Phillips Driver Size
Head Diameter Height of Head Width of Slot Depth of Slot Dimensions of Recess
Diameter Depth Width
Types A & AB Other Types Max Min Max Min Max Min Max Min Max Min Max Min
2 3/16 3/16 .172 .147 .051 .040 .031 .023 .023 .015 .102 .089 .063 .017 1
4 1/4 1/4 .225 .195 .067 .055 .039 .031 .030 .020 .128 .115 .089 .018 1
5 1/4 1/4 .252 .220 .075 .062 .043 .035 .034 .022 .154 .141 .086 .027 2
6 5/16 5/16 .279 .244 .083 .069 .048 .039 .038 .024 .174 .161 .106 .029 2
8 7/16 7/16 .332 .292 .100 .084 .054 .045 .045 .029 .189 .176 .121 .031 2
10 1/2 1/2 .385 .340 .116 .098 .060 .050 0.53 .034 .204 .191 .136 .032 2
12 9/16 9/16 .438 .389 .132 .112 .067 .056 .060 .039 .268 .255 .156 .035 3
1/4 5/8 5/8 .507 .452 .153 .131 .075 .064 .070 .046 .283 .270 .171 .036 3
5/16 13/16 5/5 .635 .568 .191 .165 .084 .072 .088 .058 .365 .352 .216 .061 4
3/8 - 5/8 .762 .685 .230 .200 .094 .081 .106 .070 .393 .380 .245 .065 4
Pan Head
Drilling Screws   Drilling Screws
Pan Heads for Self-Tapping and Drilling Screws
Nominal Size A H H1 J T M G N Phillips Driver Size
Head Diameter Height of Head Width of Slot Depth of Slot Dimensions of Recess
Slotted Recessed Diameter Depth Width
Max Min Max Min Max Min Max Min Max Min Max Min Max Min
2 .167 .155 .053 .045 .062 .053 .031 .023 .031 .022 .104 .091 .059 .017 1
3 .193 .180 .060 .051 .071 .062 .035 .027 .036 .026 .112 .099 .068 .019 1
4 .219 .205 .068 .058 .080 .070 .039 .031 .040 .030 .122 .109 .078 .019 1
5 .245 .231 .075 .065 .089 .079 .043 .035 .045 .034 .158 .145 .083 .028 2
6 .270 .256 .082 .072 .097 .087 .048 .039 .050 .037 .166 .153 .091 .028 2
7 .296 .281 .089 .079 .106 .096 .049 .039 .054 .041 .176 .163 .100 .029 2
8 .322 .306 .096 .085 .115 .105 .054 .045 .058 .045 .182 .169 .108 .030 2
10 .373 .357 .110 .099 .133 .122 .060 .050 .068 .053 .199 .186 .124 .031 2
12 .425 .407 .125 .112 .151 .139 .067 .056 .077 .061 .259 .246 .141 .034 3
1/4 .492 .473 .144 .130 .175 .162 .075 .064 .087 .070 .281 .268 .161 .036 3
5/16 .615 .594 .178 .162 .218 .203 .084 .072 .106 .085 .350 .337 .193 .059 4
3/8 .740 .716 .212 .195 .261 .244 .094 .081 .124 .100 .389 .376 .233 .065 4
Oval Head
Oval Heads        Oval Heads
Oval Heads for Tapping Screws
Nominal Size A H O J T M G N Phillips Driver Size
Head Diameter Height of Head Width of Slot Depth of Slot Diemensions of Recess
Side Height Total Height Diameter Depth Width
Max Min Max Min Max Min Max Min Max Min Max Min Max Min
4 .225 .195 .067 .054 .104 .084 .039 .031 .059 .049 .136 .123 .094 .019 1
5 .252 .220 .075 .062 .116 .095 .043 .035 .037 .055 .158 .145 .085 .028 2
6 .279 .244 .083 .069 .128 .105 .048 .039 .074 .060 .178 .165 .105 .030 2
8 .332 .292 .100 .085 .152 .126 .054 .045 .088 .072 .192 .179 .119 .031 2
10 .385 .340 .116 .098 .176 .148 .060 .050 .103 .084 .209 .196 .137 .033 2
12 .438 .389 .132 .112 .200 .169 .067 .056 .117 .096 .270 .257 .152 .038 3
14 .491 .437 .148 .126 .224 .190 .075 .064 .132 .108 .288 .275 .165 .039 3
1/4 .507 .452 .153 .131 .232 .197 .075 .064 .136 .112 .290 .277 .173 .040 3
Hex & Hex Washer Head
Self-Tapping Screws    Self-Tapping Screws   Self-Tapping Screws    Self-Tapping Screws
Hex Heads and Hex Washer Heads for Tapping and Self-Drilling Screws
Nominal Size A W H F U J T
Width Across Flats Width Across Corners Height of Head Diameter of Washer Thickness of Washer Width of Slot Depth of Slot
Max Min Min Max Min Max Min Max Min Max Min Max Min
4 .187 .181 .202 .060 .049 .243 .225 .019 .011 .039 .031 .042 .025
6 .250 .244 .272 .093 .080 .328 .302 .025 .015 .048 .039 .053 .033
7 .250 .244 .272 .093 .080 .328 .302 .029 .017 .048 .039 .062 .040
8 .250 .244 .272 .110 .096 .348 .322 .031 .019 .054 .045 .074 .052
10 .312 .305 .340 .120 .105 .414 .384 .031 .019 .060 .050 .080 .057
12 .312 .305 .340 .155 .139 .432 .398 .039 .022 .067 .056 .103 .077
14 .375 .367 .409 .190 .172 .520 .480 .050 .030 .075 .064 .111 .083
1/4 .375 .367 .409 .190 .172 .520 .480 .050 .030 .075 .064 .111 .083
5/16 .500 .489 .545 .230 .208 .676 .624 .055 .035 .084 .072 .134 .100
3/8 .562 .551 .614 .295 .270 .780 .720 .063. .037 .094 .081 .168 .131
 
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